Healthy Adult Volunteers
Conditions
Brief summary
Purpose: To compare the change in nasal cell HO-1 expression induced by two different preparations of sulforaphane (SFN)-containing nutritional supplements Participants: Healthy nonsmoking young adults, age 18-35 Procedures (methods): This pilot study will use a randomized crossover design. Subjects will be randomized to receive either the equivalent of 4 ounces/day of fresh broccoli sprouts (FBS) in food and tea, or the equivalent amount as broccoli sprout homogenates (BSH), for 3 consecutive days. Nasal lavage and blood samples will be obtained before, during and after this 3-day period. After at least a 2-week washout interval, the protocol will be repeated with the alternate supplement. The primary analysis will test the hypothesis that broccoli sprouts in food will increase HO-1 expression to a similar degree as the equivalent amount of sprouts in BSH
Detailed description
Broccoli sprouts are a concentrated source of the potent phase 2 enzyme (antioxidant) potentiator, sulforaphane (SFN) in the form of its natural precursor, sulforaphane glucosinolate (SGS™). SFN is an isothiocyanate which has generated interest recently as a chemopreventive agent in cancer research, and as an antioxidant in inflammation research. Recently published data show that 3 days intake of broccoli sprouts in homogenate form is followed by significant upregulation of several phase 2 enzymes in nasal cells. Our group's research at the UNC Center for Environmental Medicine, Asthma and Lung Biology (CEMALB) focuses on the effects of oxidant pollutants on inflammatory and host defense responses to viral infections. One of the aims of our grant is to measure the effects of pre-treatment with SFN supplements, on nasal responses to live attenuated influenza virus vaccines. In preparation for this larger study, we here propose a pilot study comparing the effects of the published BSH supplement, vs. supplementation with foods containing fresh broccoli sprouts, on relevant nasal endpoints and serum SFN levels.
Interventions
DIETARY_SUPPLEMENTSupplement A followed by Supplement B
Supplement A (3 days of Broccosprout homogenate) will be followed at least 2 weeks later by Supplement B (3 days of Broccosprout sandwich and SFN rich tea)
DIETARY_SUPPLEMENTSupplement B followed by Supplement A
Supplement B (Broccosprout sandwich and SFN rich tea for 3 days) followed at least 2 weeks later by 3 days of Supplement A (Broccosprout homogenate)
Sponsors
National Heart, Lung, and Blood Institute (NHLBI)
University of North Carolina, Chapel Hill
Study design
Allocation
RANDOMIZED
Intervention model
CROSSOVER
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
18 Years to 35 Years
Healthy volunteers
Yes
Inclusion criteria
* Healthy, nonsmoking adults, age 18-35 yr * Willing to avoid cruciferous vegetables for 1 week prior to study entry and for 2 sets of the 4 study sessions
Exclusion criteria
* Inability/unwillingness to avoid anti-inflammatory medications (inhaled, topical or systemic) prior to and during the study. Duration of prohibition prior to study will based on drug half life x 6 (ie 1 day for ibuprofen, 4 days for naproxen etc); * Inability/unwillingness to avoid antioxidant vitamins and juices or drinks with vitamin supplements added for 2 days prior to enrollment and throughout the study; * History or symptoms of allergic rhinitis; * Respiratory infection (cough, sore throat, sinusitis, fever etc) within prior 4 weeks; * Current nutritional disorder such as anorexia, bulimia, irritable bowel syndrome, Crohn's disease etc; * Pregnancy or nursing; * Asthma (other than wheezing occurring only in childhood); immunodeficiency (HIV or other); or any chronic medical condition that, in the opinion of the investigator, would preclude subject participation; * Current use of immunosuppressive drugs including corticosteroids. * Lactose and/or gluten deficiency * History of fainting or feeling severely dizzy with blood draws
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| the change in nasal cell HO-1 expression induced by two different preparations of sulforaphane (SFN)-containing nutritional supplements | 2 hours |
Secondary
| Measure | Time frame |
|---|---|
| serum SFN level | 3 days |
Countries
United States
Outcome results
None listed